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| 型号： | LTC6803IG-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 29/40页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR BATT STACK 44-SSOP |
| 标准包装： | 2,000 |
| 功能： | 电池监控器，过压/欠压保护 |
| 电池化学： | 多化学成分，超级电容器 |
| 电源电压： | 4 V ~ 55 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-FSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 44-SSOP |
| 包装： | 带卷 (TR) |
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LTC6803-1/LTC6803-3
APPLICATIONS INFORMATION
C (n – 1)
dischargeresistortothecell,andthegateterminaltothe
S output pin, as illustrated in Figure 12.
C (n)
Si2351DS
+ 3.3k
S (n)
33
1W
680313 F12
Figure 12. External Discharge FET Connection (One Cell Shown)
POWER DISSIPATION AND THERMAL SHUTDOWN
The MOSFETs connected to the pins S1 through S12 can be
used to discharge battery cells. An external resistor should
be used to limit the power dissipated by the MOSFETs. The
maximum power dissipation in the MOSFETs is limited by
the amount of heat that can be tolerated by the LTC6803.
Excessive heat results in elevated die temperatures. The
electrical characteristics for the LTC6803 I-grade are
guaranteed for die temperatures up to 85°C. Little or no
degradation will be observed in the measurement accuracy
for die temperatures up to 105°C. Damage may occur
above 150°C, therefore the recommended maximum die
temperature is 125°C.
To protect the LTC6803 from damage due to overheating,
a thermal shutdown circuit is included. Overheating of the
device can occur when dissipating significant power in the
cell discharge switches. The problem is exacerbated when
the thermal conductivity of the system is poor.
The thermal shutdown circuit is enabled whenever the
device is not in standby mode (see Modes of Operation).
It will also be enabled when any current mode input or
output is sinking or sourcing current. If the temperature
detected on the device goes above approximately 145°C,
the configuration registers will be reset to default states,
turning off all discharge switches and disabling ADC
conversions. When a thermal shutdown has occurred, the
THSD bit in the temperature register group will go high.
The bit is cleared by performing a read of the temperature
registers (RDTMP command).
Since thermal shutdown interrupts normal operation, the
internal temperature monitor should be used to determine
when the device temperature is approaching unacceptable
levels.
USING THE LTC6803 WITH LESS THAN 12 CELLS
If the LTC6803 is powered by the stacked cells, the minimum
number of cells is governed by the supply voltage require-
ments of the LTC6803. The sum of the cell voltages must be
10V to guarantee that all electrical specifications are met.
Figure 13 shows an example of the LTC6803 when used to
monitor seven cells. The lowest C inputs connect to the-
seven cells and the upper C inputs connect to C12. Other
configurations, e.g., 9 cells, would be configured in the
same way: the lowest C inputs connected to the battery
cells and the unused C inputs connected to C12. The unused
inputs will result in a reading of 0V for those channels.
The ADC can also be commanded to measure a stack of
10 or 12 cells, depending on the state of the CELL10 bit
in the control register. The ADC can also be commanded
to measure any individual cell voltage.
FAULT PROTECTION
Care should always be taken when using high energy
sources such as batteries. There are numerous ways
that systems can be misconfigured when considering
the assembly and service procedures that might affect a
battery system during its useful lifespan. Table 15 shows
the various situations that should be considered when plan-
ning protection circuitry. The first five scenarios are to be
anticipated during production and appropriate protection
is included within the LTC6803-1/LTC6803-3 device itself.
BATTERY INTERCONNECTION INTEGRITY
The FMEA scenarios involving a break in the stack of battery
cells are potentially the most damaging. In the case where
the battery stack has a discontinuity between groupings
of cells monitored by LTC6803 ICs, any load will force a
large reverse potential on the daisy-chain connection. This
680313fa
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6803IG-2#PBF | 功能描述:IC MONITOR BATT STACK 44-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC6803IG-2#TRPBF | 功能描述:IC MONITOR BATT STACK 44-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC6803IG-2PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Multicell Battery Stack Monitor |
| LTC6803IG-3#3ZZPBF | 制造商:Linear Technology 功能描述:Battery Monitoring Li-Ion 44-Pin SSOP |
| LTC6803IG-3#3ZZTRPBF | 制造商:Linear Technology 功能描述:Battery Monitoring Li-Ion 44-Pin SSOP T/R |
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